change upload output

app.py

@@ -81,7 +81,7 @@ def convert_PDF(pdf_obj, chatbot_engine):
         top_k_docs_for_context=3)
 
     # Character count as text output
-    output = f'There are {len(data[0].page_content)} characters in your document'
+    output = f'There are {len(data[0].page_content)} characters in your document, which is approximately {len(data[0].page_content) // 4} tokens.'
 
     return output, chatbot_engine